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Golf ball with very low compression and high cor / Callaway Golf Company




Title: Golf ball with very low compression and high cor.
Abstract: A golf ball having a very low compression and a high COR is disclosed herein. The core preferably comprises a single neodymium-catalyzed polybutadiene, and has a diameter ranging from 1.575 inch to 1.62 inch with a PGA compression ranging from 20 to 45. The cover preferably has a thickness ranging from 0.038 inch to 0.045 inch, and a Shore D hardness ranging from 50 to 58. The golf ball preferably has a coefficient of restitution of at least 0.780, and a PGA compression ranging from 35 to 50. ...


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USPTO Applicaton #: #20100087277
Inventors: Steven S. Ogg, David M. Bartels


The Patent Description & Claims data below is from USPTO Patent Application 20100087277, Golf ball with very low compression and high cor.

CROSS REFERENCES TO RELATED APPLICATIONS

The Present Application claims priority to U.S. Provisional Patent Application No. 61/102918, filed on Oct. 6, 2008.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

BACKGROUND

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OF THE INVENTION

1. Field of the Invention

The present invention relates to a golf ball. More specifically, the present invention relates to a golf ball with a low PGA compression and a high coefficient of restitution.

2. Description of the Related Art

The prior art discloses various two-piece golf balls. Sullivan et al., U.S. Pat. No. 4,911,451, for a GolfBall Cover Of Neutralized Poly(ethylene-acrylic acid) Copolymer, discloses in Table One a golf ball having a compression of below 50 and a cover composed of ionomers having various Shore D hardness values ranging from 50 to 61.

Sullivan, U.S. Pat. No. 4,986,545, for a GolfBall discloses a golf ball having a Rhiele compression below 50 and a cover having Shore C values as low as 82. Egashira et al., U.S. Pat. No. 5,252,652, for a Solid GolfBall, discloses the use of a zinc pentachlorothiophenol in a core of a golf ball.

Pasqua, U.S. Pat. No. 5,721,304, for a Golf Ball Composition, discloses a golf ball with a core having a low compression and the core comprising calcium oxide.

Sullivan, et al., U.S. Pat. No. 5,588,924, for a GolfBall discloses a golf ball having a PGA compression below 70 and a COR ranging from 0.780 to 0.825.

Sullivan et al., U.S. Pat. No. 6,142,886, for a GolfBall And Method Of Manufacture discloses a golf ball having a PGA compression below 70, a cover Shore D hardness of 57, and a COR as high as 0.794.

Tzivanis et al., U.S. Pat. No. 652,870, for a GolfBall, discloses a golf ball having a core compression less than 50, a cover Shore D hardness of 55 or less, and a COR greater than 0.80.

The prior art fails to disclose a golf ball with a very low PGA compression and a high coefficient of restitution.

BRIEF

SUMMARY

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OF THE INVENTION

The present invention provides a golf ball with a very low PGA compression and a high coefficient of restitution. The present invention is able to achieve these results by providing a core with a PGA compression less than 45, a cover with a Shore D hardness less than 60 and a thickness ranging from 0.035 to 0.050 inch, and a ball coefficient of restitution greater than 0.780.

One aspect of the present invention is a golf ball including a core and a cover. The core includes a single neodymium-catalyzed polybutadiene, zinc diacrylate ranging from 10 to 20 weight percent of the core, zinc oxide ranging from 10 to 17 weight percent of the core, zinc stearate in an amount of 3 to 8 weight percent of the core and zinc pentachlorothiophenol in an amount of 0.25 to 1.0 weight percent of the core. The core has a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a PGA compression ranging from 20 to 45. The cover is disposed on the core and is composed of a material comprising a blend of ionomers. The cover has a thickness ranging from 0.038 inch to 0.045 inch. The cover material has a Shore D hardness ranging from 50 to 58. The golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams, a coefficient of restitution of at least 0.780, and a PGA compression ranging from 35 to 50.

Another aspect of the present invention is a golf ball having a solid core comprising a single neodymium-catalyzed polybutadiene. The core has a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a PGA compression ranging from 20 to 45. The golf ball also has a cover disposed on the core. The cover is composed of a material comprising a blend of ionomers. The cover has a thickness ranging from 0.038 inch to 0.045 inch. The cover material has a Shore D hardness ranging from 50 to 58. The golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams, a coefficient of restitution of at least 0.780, and a PGA compression ranging from 35 to 50.

Yet another aspect of the present invention is a golf ball a having a diameter of at least 1.68 inches, a mass of at least 45 grams, a coefficient of restitution of at least 0.780, and a PGA compression ranging from 35 to 50. The golf ball has a solid core having a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a PGA compression ranging from 20 to 35. The golf ball also has a cover disposed on the core. The cover is composed of a material comprising a blend of ionomers. The cover has a thickness ranging from 0.035 inch to 0.050 inch. The cover material has a Shore D hardness ranging from 50 to 58.

Yet another aspect of the present invention is a golf ball having a cover composed of a material comprising a blend of ionomers and having a Shore D hardness ranging from 50 to 58. The cover is disposed on a solid core having a mass ranging from 38 grams to 42 grams and a PGA compression ranging from 20 to 30. The golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams, a coefficient of restitution of at least 0.790, and a PGA compression ranging from 35 to 50.

Having briefly described the present invention, the above and further objects, features and advantages thereof will be recognized by those skilled in the pertinent art from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a cross-sectional view of a golf ball.

FIG. 2 is a graph of golf ball compression (utilizing an INSTRON machine at a 200 pound load) vs. Coefficient of Restitution at 125 feet per second..

DETAILED DESCRIPTION

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OF THE INVENTION

As shown in FIG. 1, a golf ball 20 includes a core 25 and a cover 30. The core 25 is a solid core and cover 30 is disposed on the core 25. Preferably, the core 25 is compression molded into a spherical shape and the cover 30 is injection molded over the core 25.

The golf ball 20 preferably has a diameter of at least 1.68 inches and a mass of approximately 45 grams. The golf ball 20 preferably has a coefficient of restitution (“COR”) of at least 0.780, more preferably at least 0.790, and most preferably at least 0.8. The golf ball 20 preferably has an aerodynamic surface pattern such as disclosed in U.S. Patent Number, which is hereby incorporated by reference.

The core 25 is preferably composed of a polybutadiene-based mixture generally comprising a single neodymium-catalyzed polybutadiene, zinc oxide, zinc stearate, peroxide and zinc pentachlorothiophenol. The polybutadiene is preferably present in an amount ranging from 55 to 75 weight percent of the core, more preferably from 60 to 70 weight percent of the core, and most preferably approximately 65 weight percent of the core. The zinc oxide is preferably present in an amount ranging from 5 to 20 weight percent of the core, more preferably ranging from 10 to 17 weight percent of the core, and most preferably 14 weight percent of the core. The zinc stearate is preferably present in an amount ranging from 1 to 15 weight percent of the core, more preferably from 3 to 8 weight percent of the core and most preferably 5 weight percent of the core. The zinc pentachlorothiophenol is preferably present in an amount ranging from 0.25 to 1.0 weight percent of the core, more preferably from 0.5 to 0.75, and most preferably 0.68 weight percent of the core.

The core 25 preferably has a diameter ranging from 1.575 to 1.62 inches, more preferably ranging from 1.58 to 1.60 inches, and not preferably 1.595 inches. The core 25 preferably has a PGA compression below 50, more preferably below 45, and most preferably ranging from 20 to 35. The core 25 preferably has a mass ranging from 38 grams to 42 grams, most preferably approximately 40 grams.




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stats Patent Info
Application #
US 20100087277 A1
Publish Date
04/08/2010
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
/
Drawings
0


Restitution

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Games Using Tangible Projectile   Golf   Ball   Particular Unitary Or Layered Construction   Diverse Cover And Interior  

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20100408|20100087277|golf ball with very low compression and high cor|A golf ball having a very low compression and a high COR is disclosed herein. The core preferably comprises a single neodymium-catalyzed polybutadiene, and has a diameter ranging from 1.575 inch to 1.62 inch with a PGA compression ranging from 20 to 45. The cover preferably has a thickness ranging |Callaway-Golf-Company
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